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Finding the Fourth Proportional to 215,859.50, 297,886.11 and 126,435.50

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Solution

The fourth proportional to 215,859.50, 297,886.11 and 126,435.50 is: 174,480.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,859.50 : 297,886.11 = 126,435.50 : x
  2. Step 2: Convert to fraction form
    215,859.50/297,886.11 = 126,435.50/x
  3. Step 3: Cross multiply
    215,859.50x = 297,886.11 × 126,435.50
  4. Step 4: Simplify right side
    215,859.50x = 37,663,379,260.91
  5. Step 5: Solve for x
    x = 37,663,379,260.91/215,859.50
  6. Step 6: Final answer
    x = 174,480.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.